1. Bluetooth program: V5.3
2. Speaker: 13mm copper ring speaker (bass effect is obvious)
3. Chip: BlueTrum
4. Use time: about 5-6h
5. Charging time: about 1h
6. Communication distance: about 10-15m without obstacles
7. Charging interface: USB
8. Battery capacity: 50mAh
9. Frequency: 20Hz-20KHz
10. Impedance: 32 ohms
11. Sensitivity: 85dB/mW
12. Waterproof rating: IPX4
13. Weight: about 6.5g

Features:
1. External sound quality, safe travel, does not affect the communication
2. Silicone tail, soft and comfortable, clip ear without pain
3. One-button design, more convenient for music calls
4. Ear buckle support, not into the ear design, skin-friendly material, comfortable to wear
5. HIFI stereo surround sound, copper ring speaker, three frequency balance, micro-permeable holes, reduce noise
6. With light design, beautiful and shiny
7. Anti-leakage ear holes, painless to wear
8. Simple design, smooth lines, lightweight and portable